Short Quiz on SKIN GRAFTS
Instruction
2. There is 1 Mark for each correct Answer
Skin grafts stored at 40 C can survive up to?
2 weeks
4 weeks
Split skin graft can be applied over –
Muscle
Bone
Cartilage
Eyelid
Skin graft for facial wounds is taken from –
Medial aspect of thigh
Cubital fossa
Groin
Post auricular region
The organism causing destruction of skin grafts is ‑
Streptococcus
Staphylococcus
Pseudomonas
Clostridium
Which one of the following statements about Mesh Skin Grafts is not correct? –
They permit coverage of large areas
They allow egrees of fluid collections under the graft
They contract to the same degree as a grafted sheet of skin
They “take” satisfactorily on a granulating bed
Split skin grafts in young children should be harvested from:
Buttcoks
Thigh
Trunk
Upper limb
Skin grafts stored at 40 C can survive up to?
2 weeks
Excess split-skin autografts harvested and meshed during a surgical session are often stored at short-term for later burn surgery or graft failure.
The current procedure in skin graft storage involves wrapping the meshed autograft on a piece of ringer lactate or normal saline-moistened gauze, transferring it into a sterile container and storing it in a 4° C for 2 weeks. The graft should never be totally immersed in saline because it will become macerated. After 14 days of storage the respiratory activity of skin graft reduced by 50%.
Answer is ‘a’ i.e. Muscle:
- A rich vascular supply is essential for support of a split – thickness (or full thickness) graft. It does not survive when placed directly over bone, cartilage or bare tendon.
- For critical & small areas such as an eyelid, a full thickness graft is selected, so that contraction of the grafted material is mimimal.
Skin graft for facial wounds is taken from –
Ans. is ‘d’ i.e., Post auricular region
Full thickness skin graft for face is taken from post-auricular region supraclavicular region (Ref: Schwartz 7/e, p 2093)
Ans. is ‘a’ i.e., Streptococcus
Infection is the second most common cause of graft failure.
Sterilization of the recipient bed prior to graft placement is imperative.
Prior to graft application, both the number of organisms (<105 organisms per gram of granulation tissue) and the identification of specific offending organisms are of importance
Organisms like Staphylococcus aureus, Pseudomonas, and beta-hemolytica
Streptococcus have been implicated in graft failure more than other organisms.
Which one of the following statements about Mesh Skin Grafts is not correct? –
Ans. is ‘c’ i.e., They contract to the same degree as a grafted sheet of skin
Meshed skin grafts are split-thickness grafts cm 7.5
- Meshing can be done using a machine which creates regular slits in the graft, allowing it to be expanded. Thus it can cover larger areas. The slits also allow blood from the wound to escape to the surface, reducing the chances of hematoma and therefore improving graft take.
- Meshed grafts are particularly valuable in burned patients where large areas of skin need to be covered.
Drawbacks of meshed grafts are
– suboptimal appearance
– tendency to contract
Ans. B i.e. Thigh
Skin grafts
- Partial-thickness skin grafts/ Theirsch graft: Consist of epidermis & variable thickness of the dermis
- Full-thickness/ Wolfes graft: Consists of epidermis & all of the dermis
- Composite grafts: Consist of skin & some underlying tissue (fat, cartilage etc.)